Tolong bantuannya kk nomor 21,22 dan 23. tolong sama jalannya juga kak.

21) (1 1/8 x 2 1/4) – 2 5/6 = (9/8 × 9/4) – 2 5/6 = 81/32 – 2 5/6 = 2 17/32 – 2 5/6 = 51/96 – 80/96 = -29/96 (a)

22) -3 8/15 + 6 5/12 + 2 3/10 = 5 32/60 + 60/60 + 18/60 = 5 110/60 = 5 11/6 (a) *mungkin pg nya itu salah ketik dek*

23) [20/3 x 3/4] + [20/3 x 3/5] = 60/12 + 60/15 = 300/60 + 240/60 = 540/60 = 9 (a)